I've had an absolutely wonderful stay here. The home is quite, comfortable and very clean. The aircon works great and most importantly the bed and pillows and very comfortable and of good quality. Oh and the wifi is decent! This was the first time I stayed at an Airbnb where it actually looked better in person than in the photos.
In terms of location it is right around the corner from both the Asok BTS station and the Sukhumvit Metro station, making for easy access to many parts of Bangkok. Also you're right next to the Terminal 21 shopping center which has an awesome canteen on the 5th floor for good cheap eats! There's also plenty of more expensive restaurants as well.
Then last, but not least Terachai and his wife are both wonderful hosts and lovely people. They both speak fluent English and do everything they can to ensure guests have a pleasant stay.